A QUANTITATIVE DESCRIPTION TO THE COORDINATED DEVELOPMENT OF THE REGIONAL POPULATION RESOURCES ENVIRONMENT ECONOMY SOCIETY (PRED) SYSTEM
区域PRED系统协调发展的定量描述

The production function model is used to quantitatively analyze the environmental economic effects of the input and output in the agriculture production procedure. In terms of some input elements, different input level results in different financial and evironmental economics output. Marginal output decreases with the increase of input. The highest product output does not mean the maximum benefit. By financial analysis, the input level should be at the point where marginal private revenue of input equals to the element price. But according to environmental economic analysis, taking the negative external effects of input element into account, the proper input quantity should be smaller than the maximum private revenue level. It can be concluded that, to maximize the environmental social economic benefits of production, some input elements with negative environmental effects should be reduced.